Roll for paper-making machines and method of making same



Feh. 2, W28. 1,660,538

R. H. WHITNEY ROLL FOR PAPER MAKING MACHINES AND METHOD OF MAKING SAME Filed Sept. 26. 1924 mum- Patented Feb. 28, 1928.

GFFICE.

RALPH H. WHITNEY, OF AKRON, OHIO, ASSIGNOR TO THE B. F. GOODRICE COMPANY, OF NEW "YORK, N. 'Y., A CORPORATION'OF NEW YORK.

ROLL FOR PAPER-MAKING MACHINES AND METHOD OF MAKING SAME.

Application filed September 26, 1924. Serial No. 739,989.

This invention relates to endless conveyors such, for example, as are used in paper-making machines of the Four-drinier type, and more particularly to supporting rolls for such conveyors and methods of making such rolls. My improved roll may be advantageously used in other devices, but my invention is especially applicable to table rolls for supporting the wire-mesh pulp conveyor of a paper-making machine which carries the stock at the initial stage of manufacture, and to the rolls for supporting the carrier lfelt which carries the stock at a later stage of manufacture.

The table rolls heretofore most commonly used in paper-making machines have been of metal such as brass or aluminum, and consequently have been subject to being pitted by the acid solution used for washing the wire conveyor, and have had the disadvantage of excessively wearing the wire-mesh.

Belt-carrier rolls heretofore have been made of wood or of metal, the latter type being subject to corrosion by the acid feltwashing solutions, such corrosion resulting in damage to both the roll and the felt. The wooden rolls frequently sag from their own weight, due to their relatively great length, and become warped by the moisture to which they are constantly subjected. Some of the felt-carrier rolls are provided with a right and left hand tentering worm, to tenter the felt, said worm usually comprising metal strips secured to the roll, and the loosening of the tacks or screws by which the strips are iepured is a frequent cause of damage to the The chief object of my invention is to increase the life of the felt, wire or other endless carrier or carriers used in a paper-making machine.

A further object is to provide a felt-carrier or table roll, and especially a felt-tentering roll, of increased life for use in such machines.

Another object is to rovide an improved method for making sue a roll, and especially one having a tentering worm or helix.

Another object is to provide for paper machines and analogous uses, a non-corrosive, non-absorbent roll of substantially rigid construction.

Of the accompanying drawing:

Fig. 1 is a perspective view of a roll embodying and made in accordance with my invention in its preferred form.

Fig. 2 is a fragmentary view on a large scale, of one end portion of the same, part of the rubber cover being broken away to show the underlying structure, and the carrier-felt of a paper-making machine being shown, in

section, in its operative relation to the roll.

Fig. 3 is an elevation of a modified form of roll, withthe wire-mesh conveyor of a papermaking machine shown, in section, in its operative relation thereto.

Referring to the drawings, 9 is the carrierfelt ofa paper-making machine and 10 is a smooth, cylindrical roll-body, preferably hollow and of light-Wei ht metal such as aluminium, said roll-b0 y being provided with theusual journals 11, 11 at each end, and adapted to support the carrier felt 9. Mounted upon said roll-body, under substantial tension, is a relatively thin sleeve 12 of vulcanized, acid-resisting rubber, the same being held to said body chiefly by its own tension, although at its end portions one or more plies of adhesive tape 13 may be bound tightly around the respective end portions of the roll-body, and the sleeve adhesively secured thereto and to the adjacent portion of said body, as by a layer of cement 14.

The roll is provided with a tentering worm comprising one or more plies of adhesive tape 15 wound thereon in right and lefthand helices, each way from its middle, the

windings of tape producing corresponding ridges 16, 16 in the elastic, tensioned sleeve 12, constituting the cover or active portion of said worm, the adhesiveness of the tape 15 and the tension of the tape and of the sleeve 12 being suificient to hold the helices true under working conditions without additional means for securing them to the roll-body 10.

In the manufacture of the roll as shown in Figs. 1 and 2, I first bind the ends of the roll-body 10 with the tape 13 to the desired the roll-body 10, and allowed to contract in position upon the latter. The ends of the sleeve are then trimmed flush with the ends of the roll-body.

While the roll-body 10 is described as being made preferably of light-weight metal, my invention is not wholly limited, to a metal roll-body,.as the rubber sleeve will protect a wooden roll-body, for example, from the warping and deteriorating effects of the water and acid used in the operation of the paper-making machine.

The windings of adhesive tape 13 and 15 not only provide the desired surface contour of the roll, but help to anchor the rubber cover in place. The rubber sleeve remains -smooth during use and does not damage the felt or wire mesh conveyor with which it is associated. The tentering worm,

being. covered with vulcanized rubber, is highly effective in maintaining the pulpcarrier properly extended. The sleeve being cemented at the endsronly, and held in ace largely by its own tension, is more or ess self-adjusting on the roll bocly when in use, thus equalizing strains and prolonging the life of the sleeve. Worn or damaged sleeves may be easily removed and replaced with new ones at relatively small expense.

The modified roll shown in Fig. 3' is similar to the roll shown in Figs. 1 and 2,

and is made in the same way, exce t that the tentering worm is omitted. It 1s especially applicable as a table roll for the wire mesh carrier 17 of a paper-makin machine, or it may be used as a smooth felt-carrier roll between tentering rolls.

My invention may be modified within its scope, and I do not limit my claims wholly to the specific construction or exact pr0ce-,

dure described.

I claim:

1. A tentering roll for paper-making machines com rising a roll-body having a helical ridge t ereon, and a sleeve of stretched, elastic rubber embracing said roll-body, said sleeve being deformed by said ridge to provide a worm on said roll.

ridge thereon formed of a winding of'fibrous material, and a sleeve of stretched, elastic rubber embracing said roll-body and deformed by said ridge to provide a tentering worm on said roll.

5. A roll comprising a roll-body, a winding of fibrous material thereon, and a sleeve .of stretched, elastic rubber embracing said winding.

6. A roll comprising a r0ll-body,'}}a- "winding of adhesive tape thereon, andra "sleeve of stretched, elastic rubber embracing said winding.

7. A roll comprising a generally cylin drical body ortion having on its surface a design in relief, and a rubber sleeve nat-ul'al- 1y of cylindrical form and even thickness mounted thereon under sufiicient tension to conform to said desi n.

8. The method 0 makin a roll which comprises forming a roll bo y with a raised design thereon, and thenapplying an elastic cover of even thickness thereto under such tension asto cause it to take the form of said design. I

9. The method of making a roll which comprises so winding adhesive tape onto a rigi roll-body in superimposed layers as to form a helical ridge thereon, and stretch ing a rubber sleeve onto the resulting structure.

In witness whereof I have hereunto set my hand this 23rd day of September, 1924.

RALPH H. WHITNEY. 

